Change the never-defined copy-constructor signature to refer to nsCOMArray<T>

instead of nsCOMArray. Should fix OS2 bustage, which noticed this because
it instantiates the function even when its not used
r=sicking, sr=mozbot, a=tinderbox

xpcom/ds/nsCOMArray.h

@@ -209,7 +209,7 @@ class nsCOMArray : public nsCOMArray_base
 private:
 
     // don't implement these!
-    nsCOMArray& operator=(const nsCOMArray& other);
+    nsCOMArray<T>& operator=(const nsCOMArray<T>& other);
 };